/*

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of JITCraft.

 *

 * JITCraft is free software: you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation, either version 3 of the License, or (at your option)

 * any later version.

 * 

 * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY

 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * JITCraft. If not, see http://www.gnu.org/licenses/.

 */

#ifndef _include_jc_unsafe_array_

#define _include_jc_unsafe_array_

#include <assert.h>

namespace jc {

class UnsafeArray

{

  public:

    unsigned length() {

        return *(reinterpret_cast<unsigned *>(this) - 1);

    }

    unsigned *uint32Vector() {

        return reinterpret_cast<unsigned *>(this);

    }

    int *int32Vector() {

        return reinterpret_cast<int *>(this);

    }

    int readInt32(size_t index) {

        assert(index < length());

        return int32Vector()[index];

    }

    void writeInt32(size_t index, int value) {

        assert(index < length());

        int32Vector()[index] = value;

    }

    UnsafeArray *indirect(size_t index) {

        assert(index < length());

        unsigned *address = uint32Vector() + index;

        return reinterpret_cast<UnsafeArray *>(reinterpret_cast<char *>(address) + *address);

    }

    void *allocationBase() {

        return reinterpret_cast<unsigned *>(this) - 1;

    }

};

}

#endif // _include_jc_unsafe_array_